Quake II is a first-person shooter video game developed by id Software and published by Activision. It is not a direct sequel to Quake; id decided to revert to an existing trademark when they were unable to agree on a new name that did not violate another company’s trademark. The soundtrack for Quake II was mainly provided by Sonic Mayhem, with some additional tracks by Bill Brown; the main theme was also composed by Bill Brown and Rob Zombie, and one track was by Jer Sypult. Quake II takes place in a science fiction environment. In the single-player game, the player assumes the role of a Marine named Bitterman taking part in “Operation Alien Overlord”, a desperate attempt to prevent an alieninvasion of Earth by launching a counterattack against the home planet of the hostile Strogg civilization. Most of the other soldiers are captured or killed as soon as they approach the planned landing zone. Bitterman survives only because another Marine’s personal capsule collided with his upon launch, causing him to crash far short of the landing zone. It falls upon Bitterman to penetrate the Strogg capital city alone and assassinate the Strogg leader, the Makron.